Question

find the zero of the quadratic expression ×2 +2 ×_143​

Answer 1

x^2 + 2x - 143= 0
x^2 +13x - 11x - 143= 0
x(x+13) -11(x+13) =0
(x-11) (x+13)= 0
x=11 ; x= -13...
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